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Eugene -Springfield Area Natural Hazards Mitigation Plan <br />5. Annexes <br />CA Hazard Risk Ranking <br />Table C-2 presents the ranking of hazards of concern, using Vulnerability multiplied by <br />Probability divided by Capacity to calculate and prioritize total risk to Springfield <br />Utility Board (see Section 4.2.2, Components of Risk Analysis, for an explanation of <br />the Risk Metrics). These are the identified hazards to SUB and may vary from those <br />listed in the Section 1, Table 1-1. <br />Table C-2 SUB Risk Matrix <br />Hazard <br />Vulnerability <br />ProffiZility <br />Capacity <br />9w Risk Total m9 <br />ro Risk <br />High = 3 <br />High = 3 <br />High Capacity = 3 <br /><1.5 = Low <br />Moderate = 2 <br />Moderate = 2 <br />Moderate = 2 <br />1.5-2.9 = Moderate <br />Low= 1 <br />Low= 1 <br />Low-- <br />3-4.5 = High1 <br />>4.5 = Very High <br />Earthquake <br />3 <br />2 <br />1 <br />6 <br />V7Hilgh <br />Windstorm <br />3 <br />3 <br />2 <br />4.5 <br />Winter storm <br />3 <br />3 <br />2 <br />4.5 <br />High <br />Geomagnetic <br />2 <br />2 <br />1 <br />4 <br />High <br />Disturbance <br />Wildfire <br />2 <br />3 <br />2 <br />3 <br />High <br />Flood - <br />2 <br />2 <br />2 <br />2 <br />High <br />verine <br />Landslide <br />2 <br />2 <br />2 <br />2 <br />Moderate <br />Drought <br />1 <br />3 <br />2 <br />1.5 <br />Low <br />Volcano <br />1 <br />1 <br />3 <br />.33 <br />Low <br />As Table C-2 above indicates, SUB's risk matrix differs slightly from the planning <br />area. Drought is ranked low in SUB's evaluation due to a reliance on groundwater. <br />Short-term droughts have limited impact to services and water availability for the <br />utility. Alternatively, flood-riverine is ranked high in SUB's evaluation due to wellfield <br />location. SUB's Thurston and Willamette Wellfields are located within the floodplain <br />and are susceptible to flooding which could directly impact access to the wellfields and <br />SUB's ability to continue to safely supply water. <br />5-36 January 2020 <br />